I wonder what 6psi will do to our Z's hp/tq wise?

6psi = 475whp from what I've been reading.

What I dont understand is one thing....if we can make 6-8psi EASILY on a supercharger and that is the limit of the stock block, what the hell is the point of getting a turbo charger at this point. Unless you build the block, then you aren't going to make any more power than any supercharger will.

To be honest with you guys, I think a TT setup is pointless unless you're going for 700whp+ and for that you will definitely need a built motor.

Also find it really funny that everyone who is technically inclined and have lots of driving experience aren't considering a TT and are aiming for 450-500whp, while the folks who are more into aesthetics need 600whp+ TT kits for some reason. I'm not sure they know how unusable that amount of power is... I mean not that I dont think " I spin tires in 4th" isnt cool.

For me personally, I'm not really concerned with peak HP that much. I'm more interested in a solid increase in usable low-end and mid-range torque and HP that I'll see all the time as opposed to peak numbers high in the RPM range that I'll rarely get to in a daily driven street car.

6-8 psi through a good effiecent, intercooled twin screw will be more than enough power and torque for most and don't even think of hitting a roadcoarse with that level of power with out a decent brake upgrade. and on the bright side if properly done the car will drive as if the power is all motor. some people like the feeling of boost coming on and building up that turbos and centrifugals give you but personally when i put my foot to the floor i want it to be there before the pedal hits the floor. besides theres nothing like a not having to drop the clutch to smoke em.

Edit: also when u pop the hood to impress the buds u can point and go look at that instead of having to carry around a huge freakin mirror or an inspection camera to point out the paint peeling off your framerails from the snails.

this is the key in my opinion!!!

We manufacture a lot of parts for the ford gt supercars and they regularly twin turbo those cars and reach horsepower levels in excess of 1,000 horsepower. One guy just got the twin turbo kit installed on his get and he put it best...1000 horsepower is kinda like having an 18 inch member. Sure it's cool to brag about but you can't really use all of it!

One thing to consider is over all performance and what you plan on doing with the car. I plan on writing a detailed explanation of what I mean by that tomorrow.

Two questions:
1. Can you answer whether you're going with a centrifugal or twin-screw?
2. Does mid-range torque = girth?

Kyle,

Can you please tell us the estimated hp and tq gains at the low range...( under 4000 rpm)?

Many vortech systems for the 350z had VERY little gains in that range. Usually under 20 hp/tq were gained.

Thanks,
John

I knew a guy that just did a whipple blower upgrade on his GT40 and he was pushing 850-900 so what the hell is the point?

We will be using the centrifugal Vortech supercharger. We have been a Vortech distributor for many years now and we have also engineered out own kits in the past with Vortech units on vehicle's like the CLK430 and the Nissan Maxima. Both of which offered amazing low end torque due to the custom trims and modifications we made during testing and development.

Right now that question is not possible to answer but I want to acknowledge it so you don't think I'm ignoring you or skipping over it.

One of the great things about Vortech superchargers is that we can adjust different trims on the wheels which will greatly alter horsepower potential and low end torque. Until we come up with our final trim it is impossible for us to definitively answer what we expect. We really just need to do the testing.

What I can tell you, is that we are all racers at STILLEN so we all want immediate throttle response. I know for a fact that although peak horsepower numbers are always good, improving acceleration is always a big goal of ours.

Ford GT supercars are a little different than your standard street car. They are geared from the factory to reach speeds in excess of 250 MPH. A lot of owner's of the Ford GT supercars take their vehicle's to standing mile events or events like the Silver State Classic and Bonneville where huge horsepower is necessary. However, the guys who actively track their cars on circuits, generally stick with the factory or Whipple supercharger due to the fantastic amount of torque those cars produce.

Take for example our Ford GT. It only makes about 650 horsepower but we regularly race it in targa rally races in new Zealand. However, we altered the gear ratio so that we could actually use 1st, 2nd, 3rd, and 4th on the rallies. Before changing the gear ratio, we were stuck with just 2nd and 3rd, mainly 2nd though.

So to answer your question...What's the point?

It all depends on what YOU want. Again, I will write a more comprehensive explanation of what I mean by that tomorrow.

thanx for calling that one out for sure kyle now that the big question is out of the way and my fat f/i check came in time to go to my guy and see if i can get my hands on an axial kb2.6 or 2.8h unit and begin the parts acrual process. Good luck with the centrifugal kit and i'll be interested to watch the GTM vs. Stillen shootout that is sure to ensue.

wasn't trying to contest the massive horsepower demands of gt40 owners just saying that when you can get nearly the same numbers both ways, why not retain the stock responsiveness as well as it is easier to tune when the boost curve and power delivery are nearly identical stock just at higher levels.

In my opinion...It comes down to two things...Cost and purpose.

What do you plan on doing with the car and how much do you want to spend?

A whipple upgrade costs around 10K or so on those cars. A twin turbo upgrade costs between 25-35K depending on what you add or spec out on your build.

I personally like the responsiveness and performance of the superchargers, I've gone for a ride in a twin turbo GT and it was amazingly fast after 4,000 RPM...however, below that it was really disappointing.

But, the twin turbo kits look like works of art on those cars! It really just comes down to what do you want, and how do you want to do it and how much are you willing to spend.

+1 rep just for being able to say that :eek: